Google Inc.

Arash Parsa

David Edward Gay

Joshua Melcon

Ryan Huebsch

A method for detecting a traffic ramp-up rule violation includes receiving data element retrieval requests from an information retrieval system and determining a requests per second (RPS) for a key range. The method also includes determining a moving average of RPS for the key range. The method also includes determining a number of delta violations, each delta violation comprising a respective beginning instance in time when the RPS exceeded a delta RPS limit. For each delta violation, the method includes determining a maximum conforming load for the key range over and determining whether the RPS exceeded the maximum conforming load for the key range based on the beginning instance in time of the respective delta violation. When the RPS has exceeded the maximum conforming load, the method includes determining that the delta violation corresponds to a full-history violation indicative of a degradation of performance of the information retrieval system.

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Mountain View, CA, United States of America

Arash Parsa